This full USB 3.0 host controller extends your PC with PCI slots by four USB 3.0 connections. Power supply is provided via the PCI express slot and supplies a maximum power output of 3,000 mA for each USB port. Use bus speeds of up to 5 Gbps with USB SuperSpeed, backwards compatible for older USB devices with Hi-Speed, Full Speed & Low Speed. Connect USB devices such as printers, scanners, cameras or an external hard drive. Supports hot plugging & Plug and Play - no driver installation required. Enjoy the fastest SuperSpeed data transfers with the DIGITUS® USB 3.0 PCIe card and copy large quantities of data in a very short time.